Description:Field of Invention:
[001] The present invention generally relates to drone technology.
[002] In particular, the present invention relates to drone for agricultural spraying of fertilizers and pesticides.
Background for the Invention:
[003] By reference to US application no. US10364029B2 dated 2017-06-08, titled “Drone for agriculture” discloses a drone for spraying liquid over field crop includes: a frame with a slender rigid beam in the middle and two base structures at the two ends, a rigid tube with an array of nozzles on elongated stems and the rigid tube is suspended below the beam structure with retractable wires, at least three propellers on motors with arms that are rotatably mounted to each of the two base structures of the frame, a power source, at least one distance detector for measuring height, an antenna for communication, an electronic control system to operate motors and sensors, a container for a liquid material and electronic valve to allow liquid in the container to be transferred and sprayed from the nozzles, and a remote controller. The drone is intended to spray liquid over a wide strip of the field with high efficiency, precision, and safety and reduced drift of sprays.
[004] By reference to US application no. US20170015416A1 dated 2017-01-19, titled “Agricultural Crop Analysis Drone” proposes a method and system utilizing one or more agricultural drones in combination with agricultural equipment, e.g., an agricultural boom sprayer, to evaluate the crops being farmed, and to improve the real-time delivery and dispensing of liquid from the sprayer including monitoring and verifying that the liquid is being dispensed correctly and/or in accordance with a desired distribution pattern or level.
[005] By reference to World Intellectual Property Organization (WIPO) application no. WO2014160589A1 dated 2014-10-02, titled “Aerial farm robot system for crop dusting, planting, fertilizing and other field jobs” states that modern farming is currently being done by powerful ground equipment or aircraft that weigh several tons and treat uniformly tens of hectares per hour. Automated farming can use small, agile, lightweight, energy-efficient automated robotic equipment that flies to do the same job, even able to farm on a plant-by-plant basis, allowing for new ways of farming. Automated farming uses unmanned aerial vehicles (UAVs) that are equipped with detachable implements and reservoirs and that we call "aerial farm robots." Automated farming uses high-precision GPS and other precision positioning and vision technology to autonomously and precisely perform crop dusting, planting, fertilizing and other field related farming or husbandry tasks. The subsystems for the control, refill, recharge and communication subsystems of the aerial farm robots are part of the overall automated farming system, and can autonomously handle most of the husbandry tasks on a farm.
[006] By reference to CN application no. CN104494816A dated 2015-04-08, titled “Unmanned aerial vehicle specially used for spraying field ridge herbicide” states that the invention provides an unmanned aerial vehicle specially used for spraying a field ridge herbicide, which is capable of being used for small dispersed farmlands in south, and carrying out herbicide spraying on field ridges. The unmanned aerial vehicle comprises a rack, rotor wings and rotor wing motors, wherein at least four rotor wings are provided and installed around the rack through transversal connection rods, and one rotor wing motor is connected below each rotor wing; a lithium battery and an information processor are further installed on the rack. The unmanned aerial vehicle is characterized in that a medical box is installed below the rack; the upper part of the medical box is connected with the rack in a clamping manner through a plurality of clamping jaws; a telescopic flow guide tube is installed below the medical box; an electric spray nozzle is installed at the lower end of the telescopic flow guide tube; a telescopic connection rod is further installed below the medical box; a cross beam is connected below the telescopic connection rod; a limit jaw is rotationally connected with each of the left side and the right side below the cross beam; a front-and-rear guide wheel is connected below each limit jaw; an up-and-down guide block is installed below each front-and-rear guide wheel; the limit jaws are connected with the cross beam through tension springs simultaneously.
[007] By reference to KR application no. KR102088953B1 dated 2020-03-13, titled “Crop Dusting Drones” discloses an invention relates to a drone for a pest control and, more specifically, to a drone for a pest control, including a spray nozzle which can spray agricultural pesticides and fertilizers in the vertical direction in accordance with an assembly condition to perform pest control work by spraying the agricultural pesticides and the fertilizers to a farmland. According to the present invention, the drone for a pest control can improve work efficiency by spraying the agricultural pesticides to various positions by spraying the spray nozzle which is one of components of a spray unit in both upper and lower directions in accordance with the assembly by a user and controlling a spray angle in accordance with the pressure. Also, the drone for a pest control has a structure in which the spray unit is connected to a spray hose. Therefore, the drone for a pest control smoothly performs agricultural pesticide spraying work without being hung between trees when spraying the agricultural pesticides between the trees. So, the drone for a pest control can spray the agricultural pesticide by using the drone even if a worker does not manually spray the agricultural pesticides.
[008] By reference to JP application no. JP3217561U dated 2018-08-16, titled “Drone mounted sprayer” disclosed a drone-equipped spray device used for artificial pollination by flying a drone vertically and horizontally between various fruit trees such as apples and spraying pollen for pest control and pollination. An airframe body, a plurality of rotor arms extending radially from the center of the airframe body, a plurality of electric motors fixed to the tip of the rotor arm, and a plurality of propellers connected to the electric motor. And a drone comprising a plurality of legs extending downward from the bottom surface of the fuselage main body includes a spray device having spray nozzles capable of spraying liquid spray material pumped by a pump in an arbitrary direction. The spraying device accommodates the hose guide extending in the horizontal and horizontal directions from the machine body and the hose, electric motor, and rotary encoder connected to the tip of the hose guide and connecting the spray nozzle.
[009] However, none of the above-discussed inventions provides such a drone for agricultural spraying of fertilizers and pesticides. The Garuda Agri Drone comprises of Hexacopter frame, ESCs, Brushless Motors-180KV, Propellers, Flight Controller, Power Distribution Board, GPS, Transmitter, Receiver, 5L Pressure Pump, Fluid Tank, Nozzle, battery, Flow Sensor, Arduino Board, Can Hub, charger and connectors.
Objects of the Invention:
[010] The primary objective of the present invention is to provide a drone for agricultural spraying of Fertilizers and Pesticides.
[011] Another object of the invention is to provide a drone that can cover a large agriculture land is small amount of time.
[012] In addition to that the drone also reduces labour cost and provides an alternative solution to labour shortage in agriculture industry.
Summary of the Invention:
[013] Accordingly following provides a drone based agriculture spraying device. The present invention provides a spraying device for organic, inorganic fertilizers and pesticides. The proposed drone based spraying device is an unmanned aircraft made by light weight materials, consisting of Hexacopter frame, ESCs, Brushless Motors-180KV, Propellers, Flight Controller, Power Distribution Board, GPS, Transmitter, Receiver, 5L Pressure Pump, Fluid Tank, Nozzle, battery, Flow Sensor, Arduino Board, Can Hub, charger and connectors. The nozzle with the help of pressure pump sprays the fertilizer or pesticide filled in the fluid tank. The drone use rotors for propulsion and control. In addition to the drone mechanism it is also enabled with an external flow meter to limit the fluid in the fluid tank.
Brief description of drawings:
[014] Reference will be made to embodiment's of the invention, examples of which may be illustrated in accompanying figures. These figures are intended to be illustrative, not limiting. Although the invention is generally described in the context of these embodiment's, it should be understood that it is not intended to limit the scope of the invention to these particular embodiment's.
[015] Fig.1 illustrates a schematic representation of Garuda Agri Drone as per an embodiment of the present invention.
[016] The Fig.1 represents the operating procedure of the present invention and delineates signal transfer among the various components of the drone.
[017] The RF Transmitter sends signal from the control station at the land, which is received by the RC Receiver. The receiver transfer the signal to the flight controller that controls the ESC connected with the motor. The flight controller receives information from the GPS and send it to the transmitter via the receiver. The flight controller also controls the pressure pump connected with the flat fan nozzle to regulate the flow of fertilizers and pesticides present in the fluid tank.
[018] The figure 2 represents the front view of Garuda Agri Drone. The referral numerals in the Fig.2 refer to 1. Hexa Drone Frame, 2. Motor, 3. Fluid Tank, 4. Landing Gear, 5. Flat fan nozzle, 6. Propeller.
Detailed description of the invention:
[019] The present invention provides a spraying drone for organic, inorganic fertilizers and pesticides.

[020] The proposed drone based spraying device is an unmanned aircraft made by light weight materials, consisting of Hexacopter frame, ESCs, Brushless Motors-180KV, Propellers, Flight Controller, Power Distribution Board, GPS, Transmitter, Receiver, 5L Pressure Pump, Fluid Tank, Nozzle, battery, Flow Sensor, Arduino Board, Can Hub, charger and connectors.

[021] The drone uses a set of six rotors for propulsion and control. Each rotor is connected to a 180kv brushless DC motor and Electronic Speed Control (ESC) unit.

[022] The drone is controlled by a flight controller, which receives input signal from the RF transmitter via the RC receiver.

[023] This drone will be un-touched and un-manned being controlled from considerably long-distance using RF control system. It reduces the risk of human exposure to pesticides as it can be controlled from far distance.

[024] The drone receives power from a battery. The drone contains a fluid tank which can accommodate the fertilizer and pesticides.

[025] The flow of fertilizers and pesticides in the fluid tank can be controlled by the RF transmitter. A 5 liter pressure pump is provided to discharge the fluids through nozzles connected to the drone.

[026] The flow rate, area coverage of spraying and flow pattern of fluids in the fluid tank can be manually controlled by adjusting the nozzle before flight.

[027] In the proposed fertilizer and pesticide spraying drone, the capacity of fluid tank is 11 liters, fitted with a flat fan nozzle capable of spraying fluids with droplet size ranging from 80 - 140 μm.

[028] However the capacity of the fluid tank is restricted to a maximum of 8 liters with an external flow meter to provide space for gaseous expansion during application of organic fertilizer, which produces methane gas due to fermentation. It is done to avoid explosion of drone.

[029] The operational range of the drone is 500meters and the endurance of the drone with maximum payload is 7minutes. This drone takes 4 to 6 minutes to cover an acre of agriculture land for spraying fertilizers and pesticides.

[030] Additional advantages and modification will readily occur to those skilled in art. Therefore, the invention in its broader aspect is not limited to specific details and representative embodiment's shown and described herein. Accordingly various modifications may be made without departing from the spirit or scope of the general invention concept as defined by the appended claims and their equivalents. , Claims:We claim:

1. The Garuda Agri Drone is a drone based agriculture spraying device. The present invention provides a spraying device for organic, inorganic fertilizers and pesticides. The proposed drone based spraying device is an unmanned aircraft made by light weight materials, consisting of Hexacopter frame, ESCs, Brushless Motors-180KV, Propellers, Flight Controller, Power Distribution Board, GPS, Transmitter, Receiver, 5L Pressure Pump, Fluid Tank, Nozzle, battery, Flow Sensor, Arduino Board, Can Hub, charger and connectors. The nozzle with the help of pressure pump sprays the fertilizer or pesticide filled in the fluid tank. The drone use rotors for propulsion and control. In addition to the drone mechanism it is also enabled with an external flow meter to limit the fluid in the fluid tank.
2. The drone as claimed in claim 1, wherein the fluid tank is configured with an attachment to fit into drone vertical landing gears.

3.The drone as claimed in claim 1, wherein the drone center frame , the motor arms and the propeller blades are made of high density ABS plastics.

4.The drone as claimed in claim 1, wherein the fluid tank comprises of an inlet.

5.The drone as claimed in claim 4, wherein the fertilizer and pesticide are feed into the fluid tank through the inlet.

6.The drone as claimed in claim 1, wherein the quantity of fertilizer and pesticide in the fluid tank is monitored and restricted with the help of an external flow meter.

7.The flow of fertilizers and pesticides in the fluid tank can be controlled by the RF transmitter. A 5 liter pressure pump is provided to discharge the fluids through nozzles connected to the drone.
8.The flow rate, area coverage of spraying and flow pattern of fluids in the fluid tank can be manually controlled by adjusting the nozzle before flight.

9.The Garuda Agri Drone as claimed in claim 1, wherein said drone is capable of flying and landing in a stable manner.